When Kim Kyeong Yeon's 13-year-old daughter fell and injured herself on an escalator, she set in train events that years later might prevent millions of people around the world from contracting COVID-19. The accident happened because the teenager didn't want to hold the handrail due to hygiene concerns. Kyeong Yeon, a South Korean interior designer, realised that many other people did likewise for the same reason. So he decided he would have a go at inventing a sterilising system. Press the "Read more about it button" to see what he made!
Photo Credit: Debby Hudson